This is Hey You, Pikachu! for N64. It sold 1,830,000 copies across Japan and the U.S.
Despite never releasing outside those two countries, it somehow managed to become the 28th best selling game on the platform outselling games such as:

>Kirby 64 (1,770,000)
>Cruis'n USA (1,720,000)
>Turok (1,500,000)
>Mario Golf (1,470,000)
>Turok 2 (1,400,000)
>Paper Mario (1,370,000)
>Jet Force Gemini (1,160,000)
>Pilotwings 64 (1,120,000)
>F-Zero X (1,100,000)
>Bomberman 64 (1,000,000)

All that, for a game that doesn't even feature "Pokémon" in the title. It's proof that having Pikachu was all you needed to make a game successful during Pokémania. Because of this, I propose we start calling it "Pikamania" instead.
Discuss.